HairBolus:Fyodorovich at MetaFilter has obsessively created a labeled Google Map that includes labels for such things as slide path and gives before and after stills of the rock formations.

Okay, just to geek out a little further: From the point where you see the mountain crumble to the point where the rock makes its furthest progress (when it stops rolling forward) is 25 seconds. Given the altitude change (about 260 feet) and distance (a shade over 450), it comes out to about 516 feet in 25 seconds. A little more math, and you get that the rock was traveling about 14 miles an hour. Not very fast, but still, when a rock that looks like it's about the size of a small summer cottage comes feet from hitting you, it's gonna suck.

Go Fornicate Without a Partner:That was totally a woman driver. See how they just sat there and put their hazards on instead of driving forward a few feet or running on foot? Totally a clueless woman.

This comment was totally made by a male moran. See how he just sat there and bloviated without scrolling down just a few pixels to see that the front of the car was crushed or making a less stupid comment? Totally a clueless man. Totally.

That fly debris helped push his car to the side to make room for the falling rock that just miraculously stopped right before it was going to pancake that guy. He should have been dead. The man upstairs is still giving that guy time.

I saw the original video on YouTube, it starts about 15-20 seconds earlier than this GIF. In that video, you could see the mountaintop boulder give way, then time how long it took to make it's appearance.